<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <title>canvas</title>
  <meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
  <div class="container--canvas">
    <canvas id="canvas" class="canvas" width="500" height="500"></canvas>
    <canvas id="canvas2" class="canvas" width="500" height="500"></canvas>
    <canvas id="canvas3" class="canvas" width="500" height="500"></canvas>
    <canvas id="canvas4" class="canvas" width="500" height="500"></canvas>
    <canvas id="canvas5" class="canvas" width="500" height="500"></canvas>
    <canvas id="canvas6" class="canvas" width="500" height="500"></canvas>
    <canvas id="canvas7" class="canvas" width="500" height="500"></canvas>
    <canvas id="canvas8" class="canvas" width="500" height="500"></canvas>
  </div>
</body>
</html>